Duet 6HC + 3HC + 3HC one expansion does not connect

[dc42]

@maracmb if the DIAG LED is not lighting up at all, that indicates that the bootloader hasn't passed the clock startup phase. What we think is happening is that some boards are sensitive to temperature and/or supply voltage in such a way that under certain conditions, the clock does not stabilise in the time allowed by older versions of the bootloader. When this happens, the board repeats the startup process.

If you are ever able to get the board to start up (perhaps by leaving it powered up for a long time, or trying a 12V supply instead of a 24V supply), then you can upgrade the bootloader to fix this, which is what you have done with your other board. If you are not able to get the board to start up, then please email warranty@duet3d.com with a link to this thread and we will arrange for the board to be replaced.

[MaracMB]

@dc42 thank you. I've let it sit there on 12 volts for 2 hours. then 2 hours on 10 volts. it was 2 hours on 24 volts before so... sadly, no luck with booting. The other one with a newest bootloader is ticking like expected. Thanks again.

[MaracMB]

@dc42 DOLD mechatronics sent another 3HC board. It now connected and updated instantly. Under a minute job after i got replacement.
Now to figure out this M669 for quad markforged kinematics matrix stuff.. not sure if excited or scared down to the bones.

Maybe see ya in another thread I think i'll make something like this for my signature when 1s, -1s and 0s are in place

M669 K1 X1:1:0:0:0:0:0:0:0:0:0 Y1:-1:0:-1:0:0:0:0:0:0:0 Z0:0:1:0:0:0:0:0:0:0:0 U0:0:0:1:0:0:0:0:0:0:0 V0:0:0:1:0:0:0:0:0:0:0 W0:0:0:1:0:0:0:0:0:0:0 A0:0:0:1:0:0:0:0:0:0:0

Thanks for warranty.

[dc42]

@maracmb you might like to check which bootloader version is installed on the replacement board.